//Klassen
#include <iostream>
using namespace std;

class vektor
{
	public:
		
		//Die eigenschaften
		int x;
		int y;
		
		//Die Verhaltensweise
		void addieren(vektor v)
		{
			x += v.x;
			y += v.y;
		}
}
	
int main()
{
	vektor v1, v2;
	
	v1.x = 10;
	v1.y = 25;
	
	v2.x = 10;
	v2.y = -20;
	
	v1.addieren(v2);
	
	cout << "Vektor v1 = " 
		 << "(" << v1.x << "," << v1.y << ")" 
		 << endl;

	return 0;
}